Grrrr.
It happens all the time that my Visual Studio Intellisense stops working.
I read all kinds of things that may or may not work, including the obvious 'close and open' Visual Studio
I'm going to try and compile things that work here, so I don't have to do the internet search every time... but for now, just one thing that worked recently
Do you have something that works for you? Add in in the comments below